Improvement in bank notes, bonds, revenue stamps



incited fitters strut cam.

GEORGE W.'GASILEAR, OF WASHINGTON, DISTRICT OF COLUMBIA.

Letters Patent N 99,757, dated February 15, 1870.

To all whom it may concern:

Be it-known that I, GEORGE W; CA SILEA-R, of Washington, District of Columbia, have invented a new -and usel'ui' Improvement to be applied to Revenue Stamps, Bank Notes, Checks, Bonds, or other ongraved or printed securities or valuable papers, to prevent; fraudulent tampering with the written signatures, sums, values, or other written matter making a part of the same; and

My improvement consists in ruling, in an ornamental design, ground tint over the otherwise blank portion of.

the paper reserved for and intended to receive such writing, consisting of lines, preferably in the form of waved, crossed, and interlaced work, or such other appropriate design as may be preferred, in the manner of ordinary paper-ruling, using for that purpose liquid ink similar in its nature and chemical properties to that of the ordinary ruling-ink, which is to be subsequently used in writing over and npou the signatures orother matter giving value to the paper intended to be protected by this device; the only difference between the two inks being that of coloraudtiut, the ink used for the ground being of a much fainter or lighter tint than the writing ink, those colors being preferably selected which render copying by photography impossible; such a combination being that of thedccp yelluwand lightbluish hues, the one possessing very slight, and the other very powerful actinie properties, which render these tints, although so graded as to appear to the eye as of about the same general depth of col- 01', yet when photographed, to present a violent couirast in depth, the yellow appearing perfectly black,

and the blue almost white, and at the same time entirely lacking any distinction of hue. l

y In the specimen drawings accompanying this application the improvement is shown as applied to internal revenue stamps.

The position occupied by the ground-tint ruling, marked A, being that intended for the assessors name, date, cancellation, &c.

The manner of adapting the invention to bank 1 notes, and other papers of value is so obvious as to require no further specification.

The security arising'ti'om the employment of this device consists inthe condition that the ground-tint is ruled in with liquid ink of the same chemical and mechanical nature'as the ink used in subsequently writing over it, which renders any attempt; to obliterate or remove the latter by means of solvents, acids, chemicals, or any means whatever, whet-her chcnucal or mechanical, equally effective in attacking and removing the gronnd tintitself, and thus frustrating the attempt and furnishing evidence of the fraud, which, combined with .the actinic iea-tures above explained, renders this the best protection for paper composed of combined printing and writing against a certain species of easy and therefore widely practiced fraud, yet

devised.

In using the ordinary printed ground-tints heretofore employed upon checks, notes, and particularly upon stamps, in which the ground is printed in per manent oil colors, it is found to be a matter of com? parative ease to discharge the written portion without injury to the ground-tint, and such stamps, 850., being used again and again for new signatures, cancellations, &c., frauds are thereby sustained by the revenue to the extent of many millions of dollars.

One great practical advantage of this invention is that the ruling can all be 'done expeditiously, and at a merely nominal cost, by employing the ordinary ruling-machine to rule in the lines composing this ground. l

A preferable form for each line is that in which the diifereut colors employed are curved and interwoven together by one simultaneous and automatic operation, which is accomplished by means of an improved attachment to ruling machines patented by me by-patcnt bearing the same date herewith.

Having thus described my invention,

What I claim as new, and desire to secure by Lettcis Patent, is 7 As an improvement in bank notes, or otlrer similar papers representing value, leaving the spaces for signatures or other written poltions entirely blank or free from engraving, and subsequently rulingin by ma chine over such blank spaces a lace-work ground design, in fluid inks of opposite actinio powers, to be subsequently written. over with ordinary writing-fluid, substantially as and for the purpose set forth.

GEO. W. CASILEAR.

Witnesses I. F. -E. Pannnonmn, Pcncnr HAMMOND. 

